From 26202873bb51fafdaa51be3e8de7aab9beb49f70 Mon Sep 17 00:00:00 2001 From: Hans-Christian Noren Egtvedt Date: Sun, 26 Feb 2017 12:56:39 +0100 Subject: avr32: remove support for AVR32 architecture MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch drops support for AVR32 architecture from the Linux kernel. The AVR32 architecture is not keeping up with the development of the kernel, and since it shares so much of the drivers with Atmel ARM SoC, it is starting to hinder these drivers to develop swiftly. Also, all AVR32 AP7 SoC processors are end of lifed from Atmel (now Microchip). Finally, the GCC toolchain is stuck at version 4.2.x, and has not received any patches since the last release from Atmel; 4.2.4-atmel.1.1.3.avr32linux.1. When building kernel v4.10, this toolchain is no longer able to properly link the network stack. Haavard and I have came to the conclusion that we feel keeping AVR32 on life support offers more obstacles for Atmel ARMs, than it gives joy to AVR32 users. I also suspect there are very few AVR32 users left today, if anybody at all. Signed-off-by: Hans-Christian Noren Egtvedt Signed-off-by: Håvard Skinnemoen Signed-off-by: Nicolas Ferre Acked-by: Andy Shevchenko Acked-by: Boris Brezillon --- arch/avr32/mm/cache.c | 163 -------------------------------------------------- 1 file changed, 163 deletions(-) delete mode 100644 arch/avr32/mm/cache.c (limited to 'arch/avr32/mm/cache.c') diff --git a/arch/avr32/mm/cache.c b/arch/avr32/mm/cache.c deleted file mode 100644 index d947682..0000000 --- a/arch/avr32/mm/cache.c +++ /dev/null @@ -1,163 +0,0 @@ -/* - * Copyright (C) 2004-2006 Atmel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include -#include - -#include -#include -#include -#include -#include - -/* - * If you attempt to flush anything more than this, you need superuser - * privileges. The value is completely arbitrary. - */ -#define CACHEFLUSH_MAX_LEN 1024 - -void invalidate_dcache_region(void *start, size_t size) -{ - unsigned long v, begin, end, linesz, mask; - - linesz = boot_cpu_data.dcache.linesz; - mask = linesz - 1; - - /* when first and/or last cachelines are shared, flush them - * instead of invalidating ... never discard valid data! - */ - begin = (unsigned long)start; - end = begin + size; - - if (begin & mask) { - flush_dcache_line(start); - begin += linesz; - } - if (end & mask) { - flush_dcache_line((void *)end); - end &= ~mask; - } - - /* remaining cachelines only need invalidation */ - for (v = begin; v < end; v += linesz) - invalidate_dcache_line((void *)v); - flush_write_buffer(); -} - -void clean_dcache_region(void *start, size_t size) -{ - unsigned long v, begin, end, linesz; - - linesz = boot_cpu_data.dcache.linesz; - begin = (unsigned long)start & ~(linesz - 1); - end = ((unsigned long)start + size + linesz - 1) & ~(linesz - 1); - - for (v = begin; v < end; v += linesz) - clean_dcache_line((void *)v); - flush_write_buffer(); -} - -void flush_dcache_region(void *start, size_t size) -{ - unsigned long v, begin, end, linesz; - - linesz = boot_cpu_data.dcache.linesz; - begin = (unsigned long)start & ~(linesz - 1); - end = ((unsigned long)start + size + linesz - 1) & ~(linesz - 1); - - for (v = begin; v < end; v += linesz) - flush_dcache_line((void *)v); - flush_write_buffer(); -} - -void invalidate_icache_region(void *start, size_t size) -{ - unsigned long v, begin, end, linesz; - - linesz = boot_cpu_data.icache.linesz; - begin = (unsigned long)start & ~(linesz - 1); - end = ((unsigned long)start + size + linesz - 1) & ~(linesz - 1); - - for (v = begin; v < end; v += linesz) - invalidate_icache_line((void *)v); -} - -static inline void __flush_icache_range(unsigned long start, unsigned long end) -{ - unsigned long v, linesz; - - linesz = boot_cpu_data.dcache.linesz; - for (v = start; v < end; v += linesz) { - clean_dcache_line((void *)v); - invalidate_icache_line((void *)v); - } - - flush_write_buffer(); -} - -/* - * This one is called after a module has been loaded. - */ -void flush_icache_range(unsigned long start, unsigned long end) -{ - unsigned long linesz; - - linesz = boot_cpu_data.dcache.linesz; - __flush_icache_range(start & ~(linesz - 1), - (end + linesz - 1) & ~(linesz - 1)); -} -EXPORT_SYMBOL(flush_icache_range); - -/* - * This one is called from __do_fault() and do_swap_page(). - */ -void flush_icache_page(struct vm_area_struct *vma, struct page *page) -{ - if (vma->vm_flags & VM_EXEC) { - void *v = page_address(page); - __flush_icache_range((unsigned long)v, (unsigned long)v + PAGE_SIZE); - } -} - -asmlinkage int sys_cacheflush(int operation, void __user *addr, size_t len) -{ - int ret; - - if (len > CACHEFLUSH_MAX_LEN) { - ret = -EPERM; - if (!capable(CAP_SYS_ADMIN)) - goto out; - } - - ret = -EFAULT; - if (!access_ok(VERIFY_WRITE, addr, len)) - goto out; - - switch (operation) { - case CACHE_IFLUSH: - flush_icache_range((unsigned long)addr, - (unsigned long)addr + len); - ret = 0; - break; - default: - ret = -EINVAL; - } - -out: - return ret; -} - -void copy_to_user_page(struct vm_area_struct *vma, struct page *page, - unsigned long vaddr, void *dst, const void *src, - unsigned long len) -{ - memcpy(dst, src, len); - if (vma->vm_flags & VM_EXEC) - flush_icache_range((unsigned long)dst, - (unsigned long)dst + len); -} -- cgit v1.1